Inverted Y ureteral duplication with a ureteral stone in atretic segment

A case of inverted Y ureteral duplication accompanied by a calculus in an atretic ureteral segment is described. This anomaly was confirmed by surgical and histological explorations on the left side. Extirpation of the calculus, excision of the distended ureter below the bifurcation and Y-V plasty just above the bifurcation were performed. Urography suggested a similar ureteral anomaly on the right side but the patient has had no symptoms 2 years postoperatively.